Robin Boyd’s unbuilt scheme for two residential towers in Clarendon Street, East Melbourne is one of his most striking late projects – remarkable for its daring scale, its indebtedness to the megastructural polemics of Paul Rudolph and Japanese Metabolism, and its prescience – a high-rise apartment building now sits on the same site. The drawing is spectacular: trays of space are held aloft on angled concrete props that branch off trunk-like vertical slabs. With balconies and spandrels highlighted in white, the scheme’s dynamism echoes El Lissitzky’s Wolkenbugel (‘Skyhooks’) while also signaling a tragic last hurrah before Boyd’s 1971 death.